package com.fsserver.core.service.impl;

import com.fsserver.config.WechatPayConfig;
import com.fsserver.core.dto.PaymentRequestDTO;
import com.fsserver.core.service.WechatPayService;
import com.fsserver.core.vo.PaymentResponseVO;
import com.fsserver.core.vo.RequestNotification;
import com.wechat.pay.java.core.Config;
import com.wechat.pay.java.service.payments.jsapi.JsapiService;
import com.wechat.pay.java.service.payments.jsapi.model.*;
import com.wechat.pay.java.service.payments.h5.H5Service;
import com.wechat.pay.java.service.payments.nativepay.NativePayService;
import com.wechat.pay.java.service.payments.app.AppService;
import com.wechat.pay.java.service.payments.model.Transaction;
import com.wechat.pay.java.service.refund.RefundService;
import com.wechat.pay.java.service.refund.model.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.HashMap;
import java.util.Map;

@Slf4j
@Service
public class WechatPayServiceImpl implements WechatPayService {

    @Autowired
    private WechatPayConfig wechatPayConfig;

    @Autowired
    private Config config;

    private JsapiService jsapiService;
    private RefundService refundService;
    // 其他支付服务可以在这里声明

    @Autowired
    public void init() {
        this.jsapiService = new JsapiService.Builder().config(config).build();
        this.refundService = new RefundService.Builder().config(config).build();
        // 初始化其他支付服务
    }

    @Override
    public PaymentResponseVO createPayment(PaymentRequestDTO requestDTO) {
        // 根据支付类型选择不同的支付方式
        String payType = requestDTO.getPaymentType();
        
        // 记录日志
        log.info("创建微信支付订单, 类型: {}, 订单号: {}", payType, requestDTO.getOrderNo());
        
        // 根据支付类型调用不同的支付方法
        if ("JSAPI".equals(payType) || "JSAPI_MINI".equals(payType) || "JSAPI_MP".equals(payType)) {
            // JSAPI支付（小程序、公众号）
            return createJsapiPayment(requestDTO);
        } else if ("MICRO".equals(payType)) {
            // 付款码支付
            return createMicroPayment(requestDTO);
        } else if ("H5".equals(payType)) {
            // H5支付
            return createH5Payment(requestDTO);
        } else if ("NATIVE".equals(payType)) {
            // 扫码支付
            return createNativePayment(requestDTO);
        } else if ("APP".equals(payType)) {
            // APP支付
            return createAppPayment(requestDTO);
        } else {
            // 不支持的支付类型
            log.error("不支持的微信支付类型: {}", payType);
            throw new IllegalArgumentException("不支持的微信支付类型: " + payType);
        }
    }

    /**
     * 创建JSAPI支付（小程序、公众号）
     * 
     * @param requestDTO 支付请求DTO
     * @return 支付响应VO
     */
    private PaymentResponseVO createJsapiPayment(PaymentRequestDTO requestDTO) {
        try {
            // 验证必要参数
            if (StringUtils.isEmpty(requestDTO.getOpenId())) {
                throw new IllegalArgumentException("JSAPI支付必须提供openId");
            }
            
            // 构建请求对象
            PrepayRequest request = new PrepayRequest();
            request.setAppid(requestDTO.getAppId());
            request.setMchid(wechatPayConfig.getMerchantId());
            request.setDescription(requestDTO.getDescription());
            request.setOutTradeNo(requestDTO.getOrderNo());
            request.setNotifyUrl(wechatPayConfig.getNotifyUrl());
            
            // 设置金额
            com.wechat.pay.java.service.payments.jsapi.model.Amount amount = new com.wechat.pay.java.service.payments.jsapi.model.Amount();
            amount.setTotal(requestDTO.getAmount().intValue());
            amount.setCurrency("CNY");
            request.setAmount(amount);
            
            // 设置支付者
            com.wechat.pay.java.service.payments.jsapi.model.Payer payer = new com.wechat.pay.java.service.payments.jsapi.model.Payer();
            payer.setOpenid(requestDTO.getOpenId());
            request.setPayer(payer);

            // 调用微信支付接口
            log.info("调用微信JSAPI支付接口, 订单号: {}", requestDTO.getOrderNo());
            PrepayResponse response = jsapiService.prepay(request);
            
            // 构建响应对象
            PaymentResponseVO responseVO = new PaymentResponseVO();
            responseVO.setOrderNo(requestDTO.getOrderNo());
            responseVO.setPaymentType("WECHAT");
            responseVO.setPrepayId(response.getPrepayId());
            
            // 构建JSAPI支付参数（前端调用微信支付需要的参数）
            Map<String, String> jsapiParams = buildJsapiPayParams(response.getPrepayId(), requestDTO.getAppId());
            responseVO.setJsapiParams(jsapiParams);
            
            log.info("微信JSAPI支付订单创建成功, 订单号: {}, prepayId: {}", requestDTO.getOrderNo(), response.getPrepayId());
            return responseVO;
        } catch (Exception e) {
            log.error("创建微信JSAPI支付订单失败, 订单号: {}, 原因: {}", requestDTO.getOrderNo(), e.getMessage(), e);
            PaymentResponseVO errorResponse = new PaymentResponseVO();
            errorResponse.setOrderNo(requestDTO.getOrderNo());
            errorResponse.setPaymentType("WECHAT");
            errorResponse.setStatus("FAIL");
            errorResponse.setErrorMsg("创建支付订单失败: " + e.getMessage());
            return errorResponse;
        }
    }

    /**
     * 创建付款码支付
     * 
     * @param requestDTO 支付请求DTO
     * @return 支付响应VO
     */
    private PaymentResponseVO createMicroPayment(PaymentRequestDTO requestDTO) {
        try {
            // 验证必要参数
            if (StringUtils.isEmpty(requestDTO.getAuthCode())) {
                throw new IllegalArgumentException("付款码支付必须提供授权码");
            }
            
            // TODO: 实现付款码支付逻辑，使用微信支付官方SDK中的micropay接口
            log.info("调用微信付款码支付接口, 订单号: {}, 授权码: {}", requestDTO.getOrderNo(), requestDTO.getAuthCode());
            
            // 构建响应对象
            PaymentResponseVO responseVO = new PaymentResponseVO();
            responseVO.setOrderNo(requestDTO.getOrderNo());
            responseVO.setPaymentType("WECHAT_MICRO");
            
            // 由于目前SDK不完整，这里只做占位处理
            log.info("微信付款码支付功能尚未完全实现");
            
            // 在实际实现中，需要调用微信支付API并处理响应
            responseVO.setStatus("PROCESSING");
            responseVO.setTransactionId("模拟交易ID");
            
            return responseVO;
        } catch (Exception e) {
            log.error("创建微信付款码支付订单失败, 订单号: {}, 原因: {}", requestDTO.getOrderNo(), e.getMessage(), e);
            PaymentResponseVO errorResponse = new PaymentResponseVO();
            errorResponse.setOrderNo(requestDTO.getOrderNo());
            errorResponse.setPaymentType("WECHAT_MICRO");
            errorResponse.setStatus("FAIL");
            errorResponse.setErrorMsg("创建支付订单失败: " + e.getMessage());
            return errorResponse;
        }
    }

    /**
     * 创建H5支付
     * 
     * @param requestDTO 支付请求DTO
     * @return 支付响应VO
     */
    private PaymentResponseVO createH5Payment(PaymentRequestDTO requestDTO) {
        // TODO: 实现H5支付逻辑
        log.info("微信H5支付功能尚未实现");
        PaymentResponseVO responseVO = new PaymentResponseVO();
        responseVO.setOrderNo(requestDTO.getOrderNo());
        responseVO.setPaymentType("WECHAT_H5");
        responseVO.setStatus("FAIL");
        responseVO.setErrorMsg("H5支付功能尚未实现");
        return responseVO;
    }

    /**
     * 创建扫码支付
     * 
     * @param requestDTO 支付请求DTO
     * @return 支付响应VO
     */
    private PaymentResponseVO createNativePayment(PaymentRequestDTO requestDTO) {
        // TODO: 实现扫码支付逻辑
        log.info("微信扫码支付功能尚未实现");
        PaymentResponseVO responseVO = new PaymentResponseVO();
        responseVO.setOrderNo(requestDTO.getOrderNo());
        responseVO.setPaymentType("WECHAT_NATIVE");
        responseVO.setStatus("FAIL");
        responseVO.setErrorMsg("扫码支付功能尚未实现");
        return responseVO;
    }

    /**
     * 创建APP支付
     * 
     * @param requestDTO 支付请求DTO
     * @return 支付响应VO
     */
    private PaymentResponseVO createAppPayment(PaymentRequestDTO requestDTO) {
        // TODO: 实现APP支付逻辑
        log.info("微信APP支付功能尚未实现");
        PaymentResponseVO responseVO = new PaymentResponseVO();
        responseVO.setOrderNo(requestDTO.getOrderNo());
        responseVO.setPaymentType("WECHAT_APP");
        responseVO.setStatus("FAIL");
        responseVO.setErrorMsg("APP支付功能尚未实现");
        return responseVO;
    }
    
    /**
     * 构建JSAPI支付参数
     * 
     * @param prepayId 预支付ID
     * @param appId 应用ID
     * @return JSAPI支付参数
     */
    private Map<String, String> buildJsapiPayParams(String prepayId, String appId) {
        // 实际实现中需要按照微信支付文档构建参数和签名
        Map<String, String> params = new HashMap<>();
        params.put("appId", appId);
        params.put("timeStamp", String.valueOf(System.currentTimeMillis() / 1000));
        params.put("nonceStr", generateNonceStr());
        params.put("package", "prepay_id=" + prepayId);
        params.put("signType", "RSA");
        // TODO: 实现签名逻辑
        params.put("paySign", "签名结果");
        return params;
    }
    
    /**
     * 生成随机字符串
     * 
     * @return 随机字符串
     */
    private String generateNonceStr() {
        return java.util.UUID.randomUUID().toString().replaceAll("-", "");
    }

    @Override
    public Map<String, Object> queryOrder(String orderNo) {
        try {
            log.info("查询微信支付订单, 订单号: {}", orderNo);
            
            // 构建查询请求
            QueryOrderByOutTradeNoRequest request = new QueryOrderByOutTradeNoRequest();
            request.setMchid(wechatPayConfig.getMerchantId());
            request.setOutTradeNo(orderNo);
            
            // 查询订单
            Transaction transaction = jsapiService.queryOrderByOutTradeNo(request);
            
            // 构建返回结果
            Map<String, Object> result = new HashMap<>();
            result.put("orderNo", orderNo);
            result.put("transactionId", transaction.getTransactionId());
            result.put("tradeState", transaction.getTradeState().name());
            result.put("tradeStateDesc", transaction.getTradeStateDesc());
            
            // 添加支付成功的额外信息
            if ("SUCCESS".equals(transaction.getTradeState().name())) {
                result.put("successTime", transaction.getSuccessTime());
                result.put("bankType", transaction.getBankType());
                if (transaction.getAmount() != null) {
                    result.put("payerTotal", transaction.getAmount().getPayerTotal());
                    result.put("total", transaction.getAmount().getTotal());
                }
            }
            
            log.info("查询微信支付订单成功, 订单号: {}, 状态: {}", orderNo, transaction.getTradeState().name());
            return result;
        } catch (Exception e) {
            log.error("查询微信支付订单失败, 订单号: {}, 原因: {}", orderNo, e.getMessage(), e);
            Map<String, Object> errorResult = new HashMap<>();
            errorResult.put("orderNo", orderNo);
            errorResult.put("errorMsg", "查询订单失败: " + e.getMessage());
            return errorResult;
        }
    }

    @Override
    public boolean closeOrder(String orderNo) {
        try {
            log.info("关闭微信支付订单, 订单号: {}", orderNo);
            
            // 构建关闭订单请求
            CloseOrderRequest request = new CloseOrderRequest();
            request.setMchid(wechatPayConfig.getMerchantId());
            request.setOutTradeNo(orderNo);
            
            // 关闭订单
            jsapiService.closeOrder(request);
            
            log.info("关闭微信支付订单成功, 订单号: {}", orderNo);
            return true;
        } catch (Exception e) {
            log.error("关闭微信支付订单失败, 订单号: {}, 原因: {}", orderNo, e.getMessage(), e);
            return false;
        }
    }

    @Override
    public Map<String, Object> refund(String orderNo, String refundNo, Long totalAmount, Long refundAmount, String reason) {
        try {
            log.info("申请微信支付退款, 订单号: {}, 退款单号: {}, 退款金额: {}", orderNo, refundNo, refundAmount);
            
            // 构建退款请求
            CreateRequest request = new CreateRequest();
            request.setOutTradeNo(orderNo);
            request.setOutRefundNo(refundNo);
            request.setReason(reason);
            request.setNotifyUrl(wechatPayConfig.getNotifyUrl() + "/refund");
            
            // 设置金额
            AmountReq amountReq = new AmountReq();
            amountReq.setTotal(totalAmount);
            amountReq.setRefund(refundAmount);
            amountReq.setCurrency("CNY");
            request.setAmount(amountReq);

            // 申请退款
            Refund refund = refundService.create(request);
            
            // 构建返回结果
            Map<String, Object> result = new HashMap<>();
            result.put("refundId", refund.getRefundId());
            result.put("outRefundNo", refund.getOutRefundNo());
            result.put("status", refund.getStatus());
            result.put("createTime", refund.getCreateTime());
            
            // 退款金额信息
            if (refund.getAmount() != null) {
                Map<String, Object> amountInfo = new HashMap<>();
                amountInfo.put("total", refund.getAmount().getTotal());
                amountInfo.put("refund", refund.getAmount().getRefund());
                amountInfo.put("payerTotal", refund.getAmount().getPayerTotal());
                amountInfo.put("payerRefund", refund.getAmount().getPayerRefund());
                result.put("amount", amountInfo);
            }
            
            log.info("申请微信支付退款成功, 订单号: {}, 退款单号: {}, 退款ID: {}", orderNo, refundNo, refund.getRefundId());
            return result;
        } catch (Exception e) {
            log.error("申请微信支付退款失败, 订单号: {}, 退款单号: {}, 原因: {}", orderNo, refundNo, e.getMessage(), e);
            Map<String, Object> errorResult = new HashMap<>();
            errorResult.put("orderNo", orderNo);
            errorResult.put("outRefundNo", refundNo);
            errorResult.put("errorMsg", "申请退款失败: " + e.getMessage());
            return errorResult;
        }
    }

    @Override
    public Map<String, Object> queryRefund(String refundNo) {
        try {
            log.info("查询微信支付退款, 退款单号: {}", refundNo);
            
            // 构建查询请求
            QueryByOutRefundNoRequest request = new QueryByOutRefundNoRequest();
            request.setOutRefundNo(refundNo);
            
            // 查询退款
            Refund refund = refundService.queryByOutRefundNo(request);
            
            // 构建返回结果
            Map<String, Object> result = new HashMap<>();
            result.put("refundId", refund.getRefundId());
            result.put("outRefundNo", refund.getOutRefundNo());
            result.put("status", refund.getStatus());
            result.put("createTime", refund.getCreateTime());
            result.put("successTime", refund.getSuccessTime());
            
            // 退款金额信息
            if (refund.getAmount() != null) {
                Map<String, Object> amountInfo = new HashMap<>();
                amountInfo.put("total", refund.getAmount().getTotal());
                amountInfo.put("refund", refund.getAmount().getRefund());
                amountInfo.put("payerTotal", refund.getAmount().getPayerTotal());
                amountInfo.put("payerRefund", refund.getAmount().getPayerRefund());
                result.put("amount", amountInfo);
            }
            
            log.info("查询微信支付退款成功, 退款单号: {}, 状态: {}", refundNo, refund.getStatus());
            return result;
        } catch (Exception e) {
            log.error("查询微信支付退款失败, 退款单号: {}, 原因: {}", refundNo, e.getMessage(), e);
            Map<String, Object> errorResult = new HashMap<>();
            errorResult.put("outRefundNo", refundNo);
            errorResult.put("errorMsg", "查询退款失败: " + e.getMessage());
            return errorResult;
        }
    }

    @Override
    public boolean handlePaymentNotification(RequestNotification notification) {
        try {
            log.info("处理微信支付通知, 请求ID: {}", notification.getRequestId());
            
            // 实际处理逻辑需要根据微信支付通知规范实现
            // 1. 验证签名
            // 2. 解析通知数据
            // 3. 判断支付状态并更新本地订单状态
            // 4. 处理业务逻辑
            
            // TODO: 完整实现通知处理逻辑
            String notifyData = notification.getBody();
            log.info("微信支付通知数据: {}", notifyData);
            
            // 简单解析示例（实际应该使用微信支付SDK解析）
            boolean success = notifyData.contains("SUCCESS");
            if (success) {
                log.info("支付成功，更新订单状态");
                // 更新订单状态的业务逻辑
            } else {
                log.warn("支付未成功，状态为其他值");
            }
            
            return true;
        } catch (Exception e) {
            log.error("处理微信支付通知失败, 原因: {}", e.getMessage(), e);
            return false;
        }
    }

    @Override
    public boolean handleRefundNotification(RequestNotification notification) {
        try {
            log.info("处理微信退款通知, 请求ID: {}", notification.getRequestId());
            
            // 实际处理逻辑需要根据微信支付退款通知规范实现
            // 1. 验证签名
            // 2. 解析通知数据
            // 3. 判断退款状态并更新本地退款状态
            // 4. 处理业务逻辑
            
            // TODO: 完整实现退款通知处理逻辑
            String notifyData = notification.getBody();
            log.info("微信退款通知数据: {}", notifyData);
            
            // 简单解析示例（实际应该使用微信支付SDK解析）
            boolean success = notifyData.contains("SUCCESS");
            if (success) {
                log.info("退款成功，更新退款状态");
                // 更新退款状态的业务逻辑
            } else {
                log.warn("退款未成功，状态为其他值");
            }
            
            return true;
        } catch (Exception e) {
            log.error("处理微信退款通知失败, 原因: {}", e.getMessage(), e);
            return false;
        }
    }
} 